Worth shopping around, a simple Power of Attorney should not cost too much. Suggest phoning a few solicitors for a quote. The actual fee is on the link.Last one I applied for was about 10 years ago so I am a bit out of date.

I have just had to sort out myself and son being a deputy for my wife who has dementsia and cannot make decisions for herself.It cost me about £1500 with an on cost of £60 a year insurance via the Office of the public guardian.